what the hell is a nug i keep hearin people say it but i dunno what it means. im good on most other words its just this one i got trouble with.
1 Improper use of contact lenses or steroid eyedrops can lead to fungal infections, which in turn can cause corneal ulcers. Also, a corneal injury that results in plant material getting into the eye can lead to fungal keratitis.  Acanthamoeba are microscopic, single-celled amoeba that can cause human infection.
Many viruses like feline herpes and upper respiratory symptoms may cause ulceration of the cornea. Symptoms of corneal ulceration include holding the eye closed, light sensitivity, redness, eye discharge, and sometimes clouding of the cornea in the area of the ulcer.